Ex safety sensor

Ex RC Si 56


  • Ex zone 1 and 21

  • Thermoplastic enclosure with cable

  • Suitable for the food processing industry

  • Long life

  • Reed contacts, coded

  • Actuation from front

  • Attention: Please state required international approvals with your order!

Notes

  • The actuator is not included in the delivery of the switches.

Technical data

Applied standards
EN IEC 60079-0, EN 60079-18, EN 60947-5-1, EN 60947-5-3, EN ISO 13849-1, EN ISO 14119
Enclosure
thermoplastic, glass-fibre reinforced, shockproof, self-extinguishing UL 94 V-0
Target object / Actuator
Ex MC 56, Ex MC 56-3
Sensor type
type 4 interlocking device
Coding level
low coding
Degree of protection
IP67 (IEC/EN 60529)
Switching system
reed contacts
Switching elements
1 NC/1 NO contact or 2 NC contacts
Connection
cable 4 x AWG 24 UL
Cable cross-section
4 x 0.22 mm²
Cable length
2, 5 or 10 m, max. 15 m
Switching voltage
max. 30 VDC
Rated operating current/voltage Ie/Ue
max. 125 mA, with LED: 20 mA / 24 VDC
Voltage drop at Ie
switching contacts: 2.5 V
LED: 3 V
Assured switching distance »OFF« sar 
30 mm
Repeatability
< 0.5 mm
Hysteresis
min. 23 mm
Degree of pollution
3
Safety class
II
Ambient temperature
T6: –20 °C … +70 °C,
T5: –20 °C … +85 °C
Mechanical life
> 1 million operations
Impact energy
max. 7 J
Vibration resistance
10 g (10-500 Hz)
Shock resistance
100 g (1 ms, ½ sin)
Bounce duration
max. 2 ms (response time, incl. bounce)
Ex marking
L II 2G Ex mb IIC T6/T5 Gb
L II 2D Ex mb IIIC T80 °C/T95 °C Db
IECEx Ex mb IIC T6/T5 Gb
Ex mb IIIC T80 °C/ T95 °C Db
Approvals
PTB 08 ATEX 2027 X
IECEx PTB 08.0042 X
f d a
< on request
EN ISO 13849-1
Performance Level PL e
Category
4
B10d (10 % load)
2 million
TM
max. 20 years
MTTFd
> 100 years
DC/DCavg
> 99 %
Note
The safety-related data are only valid in combination with a safety module, e.g. SRM 21 RT2 (mat. no. 1179203).
 

Downloads

Mounting and wiring instructions – Ex RC Si 56

German, English, French, Italian, Portuguese

PDF 2 MB 13.03.2026
Please go to the relevant product pages for additional downloads.

Variants / Options

The following variants / options are available on request:

  • Maritime certification to DNV <

to your contact persons

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